Diesel Power Diesel Power EngineEngine(Enginator)(Enginator)

Dr. Dr. Rudolf DieselRudolf Diesel

IntroductionIntroduction

Diesel Engine invented in 1897. Rudolf Diesel Diesel Engine invented in 1897. Rudolf Diesel (Inventor) proved that fuel could be ignited without (Inventor) proved that fuel could be ignited without spark & made first successful Diesel Engine.spark & made first successful Diesel Engine.

A Diesel Engine is an internal combustion engine, A Diesel Engine is an internal combustion engine, which operates using the diesel cycle. Diesel Engines which operates using the diesel cycle. Diesel Engines are manufactured in two stroke & four stroke are manufactured in two stroke & four stroke versions.versions.

Diesel EngineDiesel Engine

Types of Diesel EngineTypes of Diesel Engine

There are two main types of internal There are two main types of internal combustion engines.combustion engines.

One type is called a spark-ignition One type is called a spark-ignition engine. It uses electricity & spark engine. It uses electricity & spark plugs to ignite the fuel in the engine’s plugs to ignite the fuel in the engine’s cylinders.cylinders.

Second type, the diesel engine, is a Second type, the diesel engine, is a compression-ignition engine. When air compression-ignition engine. When air confined in a cylinder is suddenly confined in a cylinder is suddenly compressed, the temperature of the air compressed, the temperature of the air rises. In a diesel engine, each piston rises. In a diesel engine, each piston compress air in a cylinder. Fuel is compress air in a cylinder. Fuel is injected & forms an explosive mixture, injected & forms an explosive mixture, which ignites spontaneously under which ignites spontaneously under pressure.pressure.

Diesel EngineDiesel Engine

Air CleanerAir Cleaner ValvesValves PistonsPistons SelfSelf Diesel FilterDiesel Filter Gear BoxGear Box BracketBracket Oil chamberOil chamber Radiator Radiator

Cooling FanCooling Fan

Diesel EngineDiesel Engine

Diesel FilterDiesel Filter Oil FilterOil Filter Nosils & Nosils &

AutomizerAutomizer Gear BoxGear Box Crank ShaftCrank Shaft Engine Engine

BlockBlock Engine HeadEngine Head Cam ShaftCam Shaft

Piston & Piston PartsPiston & Piston Parts

Main Piston PartsMain Piston Parts

PistonPiston Piston RodPiston Rod CrossheadCrosshead Connecting Connecting

RodRod Crank ShaftCrank Shaft

Stroking in Diesel EngineStroking in Diesel Engine

1.1. IntakeIntakeCombustible mixtures are Combustible mixtures are

emplaced in the combustion chamber.emplaced in the combustion chamber.

2.2. CompressionCompressionThe mixtures are placed under The mixtures are placed under

pressure.pressure.

3.3. Combustion / ExpansionCombustion / ExpansionThe mixture is burnt, almost The mixture is burnt, almost

invariably a deflagration, although a few invariably a deflagration, although a few systems involve detonation. The got mixture systems involve detonation. The got mixture is expanded, pressing on & moving parts of is expanded, pressing on & moving parts of the engine & performing useful work.the engine & performing useful work.

4.4. ExhaustExhaustThe cooled combustion products The cooled combustion products

are exhausted into the atmosphere.are exhausted into the atmosphere.

Stroking in Diesel EngineStroking in Diesel Engine

AC GenerationAC Generation

Whenever the flux Whenever the flux associated with a associated with a circuit is changed circuit is changed on EMF is on EMF is induced in the induced in the circuit. This EMF circuit. This EMF lasting only so lasting only so long as the change long as the change is talking flux.is talking flux.

AlternatorAlternatorAlternatorAlternator

An alternator is an An alternator is an electromechanical device that electromechanical device that converts mechanical energy to converts mechanical energy to alternating current electrical alternating current electrical energy. Most alternators use a energy. Most alternators use a rotating magnetic field but linear rotating magnetic field but linear alternators are occasionally used. alternators are occasionally used. In principle, any AC electrical In principle, any AC electrical generator can be called an generator can be called an alternator, but usually the word alternator, but usually the word refers to small rotating machines refers to small rotating machines driven by automotive & other driven by automotive & other internal combustion engines. internal combustion engines. Large alternators in power stations Large alternators in power stations which are driven by steam which are driven by steam turbines are called turbo-turbines are called turbo-alternators.alternators.

World’s Energy Production Pie World’s Energy Production Pie ChartChart

Comparison between 2 stroke & Comparison between 2 stroke & 4 stroke engine4 stroke engine

2 stroke engine can run in 2 stroke engine can run in any direction.any direction.

Thermal efficiency is low of Thermal efficiency is low of this engine.this engine.

In 2 stroke engine power In 2 stroke engine power stroke is obtained in every stroke is obtained in every revolution of crank.revolution of crank.

At same speed & given size, At same speed & given size, the engine should develop the engine should develop more power.more power.

4 stroke engine runs in specific 4 stroke engine runs in specific direction.direction.

Thermal efficiency is more Thermal efficiency is more than in 4 stroke engine due to than in 4 stroke engine due to positive scavenging.positive scavenging.

In the 4 stroke engine, a power In the 4 stroke engine, a power stroke is obtained in every stroke is obtained in every four strokes of piston or 2 four strokes of piston or 2 revolution of crank.revolution of crank.

Low power is developed in Low power is developed in this engine.this engine.

ADVANTAGESADVANTAGES1.1. The design & layout of the plant are quite simple.The design & layout of the plant are quite simple.2.2. It occupies less space as the number & size of the auxiliaries is It occupies less space as the number & size of the auxiliaries is

small.small.3.3. It can be located at any place.It can be located at any place.4.4. It can be started quickly & can pickup load in a short time.It can be started quickly & can pickup load in a short time.5.5. There are no standby losses.There are no standby losses.6.6. It requires less quantity of water for cooling.It requires less quantity of water for cooling.7.7. The overall cost is much less than others.The overall cost is much less than others.8.8. The Thermal efficiency of the plant is lower than other power The Thermal efficiency of the plant is lower than other power

stationsstations9.9. It requires less operating staff.It requires less operating staff.

DISADVANTAGESDISADVANTAGES

1.1. The plant has high running changes as the fuel is used is costly.The plant has high running changes as the fuel is used is costly.

2.2. The plant does not work satisfactorily under overload condition for long The plant does not work satisfactorily under overload condition for long period.period.

3.3. The plant can only generate small power.The plant can only generate small power.

4.4. The cost of lubrication is generally high.The cost of lubrication is generally high.

5.5. The maintenance charges are generally high.The maintenance charges are generally high.

GROUP MEMBERSGROUP MEMBERS

Adeel Irtiza Hussain SiddiuqiAdeel Irtiza Hussain Siddiuqi 08/EP/20108/EP/201 Furqan AliFurqan Ali 08/EP/21208/EP/212 Imran KhanImran Khan 08/EP/21408/EP/214 Mehtab Hussain SoomroMehtab Hussain Soomro 08/EP/22208/EP/222 Muhammad AamirMuhammad Aamir 08/EP/22508/EP/225 Tabsheer QadeerTabsheer Qadeer 08/EP/23308/EP/233 Shuja-ur-RehmanShuja-ur-Rehman 08/EP/24508/EP/245

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